From both the economic and the enviromental angle, bio-gas is the ideal solution for rural households: cheap with no recurring maintenance costs and zero impact on the environment. Why hasn't it been adopted more widely? The benefits of this appropriate technology are numerous and some appear self-evident. For one, there is no emission of greenhouse gases that cause climate change, unlike in the burning of fossil fuels. Kamla bhains had the most soulful eyes. Those eyes remained trained on me as I cooled my heels in the cow enclosure, banished from the cowshed itself where the delicate operation of milking Rama, her huge mama, was in progress. This was happening on camera, under strict preconditions